Friction-wheel gearing.



No. 704,72l. Patented July l5, I902. G. VOIGT.

FRICTION WHEEL HEARING.

(Application filed Dec. 13. 1901.)

(No Model.)

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UNITED STATES PATENT OFFICE; I

GUSTAV VOIGT, OF BERLIN, GERMANY.

FRICTIO -WHEEL GEARING.

SPECIFICATION forming part of Letters Patent No. 704,7l2l, dated July15, 1902.

Application filed December 13, 1901. Serial No. 85.807. (Nu model.)

To all whom it may concern.

Be it known that I, GIISTAV VOIGT, engineer, of 12 N euenburgerstrasse,Berlin, S.'W., in the Empire of Germany, have invented certain new anduseful Improvements in Friction-Wheel Gearing, of which the following isa full, clear, and exact specification.

The invention relates to friction wheel gearing, the object being to'providea gear in which a strong transmission'is obtained in a simplemanner and which is capable of being quickly and surely thrown out ofgear when required.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a sectional elevation, and Fig. 2

is an end view. v

In carrying the invention into efiect in one convenient manner where'twoshafts m nin the same plane are to be coupled one to another by gearinga relatively large hollow or flanged wheel 61 is securely attached to"one of the shafts m to be connected, while a smaller wheel or pulley ais securely attached to the other shaft n and lies within thehollow partI v within the larger wheel, a pair of smaller wjheels j ournaled instationary bearings and of the larger wheel on thebther shaft.

A lever e is carried freely on the central smaller wheel or pulley, uponthe ends of, which two friction-wheels cc are secured symmetrically,which grip upon the inside flanges of the larger hollow wheel (1upon'the shaft.

The inner faces of these frictionwheels are connected with the centralsmaller wheel or pulley a, by means of intermediate fricti0nwheels .2 2,arranged at both sides of theinner wheel or pulley, so that theseintermediate friction-wheels are gripped between the outerfriction-wheels and the inner smaller wheel or pulley before referredto. The outer friotion-wheels carried upon the before mentioned lever eare supported in slide-blocks and are capable of. being removed awayfrom the hollow larger wheel, so as to render the friction-gearinoperative, which is attained when the operating-lever is brought intoa sufficiently oblique position for the purpose. By moving thelever inthe otherdirection, however, a braking action is produced, which forcesthe outer friction-wheels strongly againstthe inner faces of the flangesof the large hollow wheel, thus insuring also an intimate contactbetween the inner friction wheelsof the gear. Y

The relative transmission between the two shafts is determined alone bythe proportion which existsbetween the diameter of the roll circle to*the diameters of the hollow outer and-the inner small wheel of themechanism. .If these are; for example, in the proportion of sixto one,then the-one shaft will run six times as fast as the other shaft,

I clairn Incombination, a shaft, a larger: h0llow"/ wheel of dish shapemounted on theend thereof, a second shaft axially in line therewith, asmaller-wheel carried by said second shaft having their peripheries incontactfwith said smaller wheel, and a reversing-frame and a pair ofsmall rollers journaled thereon havingtheir peripheries in contact withthe innercircumference of the large wheeland designed to'contact'with'said pair of smaller wheels,,substantially'as described.

lnwitness whereof I havehereunto set my hand in presence of twowitnesses.

fHANs HEIMANN,

WOLDEMAR I-IAuPr.

